body
{
    background-color: black;
    margin: 0;
    padding: 0;   
}
.topdiv
{
    background-color: green;
    width: 100%;
    height: 50px;
}
.btn
{
    color: white;
    width: 24%;
    height: 50px;
    border: green;
    border-bottom: white solid 5px;
    font-size: 16px;
    background-color: green;;
}
.btn1
{
    color: white;
    width: 49%;
    height: 50px;
    border: green;
    border-bottom: white solid 5px;
    font-size: 16px;
    background-color: green;
}
.th
{
    height: 100px;
    background-color: black;
    border: green solid 10px;
    position: absolute;
    top: 50px;
}
.th1
{
    height: 200px;
    background-color: black;
    border: green solid 10px;
    position: absolute;
    top: 50px;
}